scholarly journals Investigation on Mass Sensitivity of N-M Type Electrode Quartz Crystal Microbalance

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2125 ◽  
Author(s):  
Qiao Chen ◽  
Xianhe Huang ◽  
Wei Pan ◽  
Yuan Xu ◽  
Zhichao Fan
Keyword(s):  
Quantitative Analysis ◽  
Quartz Crystal Microbalance ◽  
Crucial Role ◽  
Quartz Crystal ◽  
Practical Application ◽  
Mass Sensitivity ◽  
Electrode Mass ◽  
Maximum Value ◽  
Quartz Crystal Microbalances ◽  
The Relationship

Mass sensitivity plays a crucial role in the practical application of quartz crystal microbalances (QCMs)-based quantitative analysis. n-m type QCMs have many applications, so it is necessary to clarify the relationship between the mass sensitivity and the electrode of the n-m type QCM. The performance of gold-plated films with different electrodes was studied by theoretical calculation and experiment. The results show that the mass sensitivity on the surface of the n electrode and the surface of the m electrode are essentially the same. Meanwhile, the mass sensitivity of n-m type QCMs varies with the diameter of the n and m electrodes. When the diameter of the n electrode is close to half the diameter of the m electrode, mass sensitivity is at maximum value. These results are important for the further designs and applications of n-m type QCMs.

scholarly journals Assessing the Mass Sensitivity for Different Electrode Materials Commonly Used in Quartz Crystal Microbalances (QCMs)

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3968 ◽  
Author(s):  
Xianhe Huang ◽  
Qiao Chen ◽  
Wei Pan ◽  
Jianguo Hu ◽  
Yao Yao
Keyword(s):  
Data Analysis ◽  
Electrode Material ◽  
Quartz Crystal ◽  
Electrode Materials ◽  
Metal Electrodes ◽  
Mass Sensitivity ◽  
Practical Applications ◽  
Quartz Crystal Microbalances ◽  
Silver Electrodes ◽  
The Relationship

Mass sensitivity is vital for quartz crystal microbalance (QCM)-based data analysis. The mass sensitivity distribution of QCMs may differ greatly depending on the shapes, thicknesses, sizes, and materials of the metal electrodes. This is not considered by the Sauerbrey equation, and has a large potential to cause errors in QCM-based data analysis. Many previous works have studied the effects of shape, thickness, and size of metal electrodes on mass sensitivity. However, it is necessary to continue to clarify the relationship between the mass sensitivity and the electrode material of the QCM. In this paper, the results of both theoretical calculation and experimental analysis showed that the mass sensitivity of QCMs with gold electrodes is higher than that of the QCMs with silver electrodes, which in turn indicated that the mass sensitivity of QCMs varies with the electrode material. Meanwhile, the results of this study showed that the mass sensitivity of QCMs with different electrode materials is not proportional to the density of the electrode materials. This result suggests that, in order to obtain more accurate results in the practical applications of QCMs, the influence of electrode material on the mass sensitivity of the QCMs must be considered.

scholarly journals Response of Quartz Crystal Microbalance Loaded with Single-drop Liquid in Gas Phase

2014 ◽  
Vol 8 (1) ◽  
pp. 197-201
Author(s):  
Li Yang ◽  
Xianhe Huang
Keyword(s):  
Resonant Frequency ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Liquid Droplet ◽  
Theoretical Formula ◽  
Frequency Change ◽  
Single Drop ◽  
The Relationship ◽  
Liquid Property ◽  
Repeated Experiment

The frequency response of quartz crystal microbalance loaded by single-drop liquid is studied in this paper. Previous studies have shown that the relationship between resonant frequency and properties of liquid by completely immersing one side of the crystal in liquid. In this work, only localized portion of crystal was wetted by liquid droplet. Repeated experiment shows the relationship between liquid property include viscosity and density to resonant frequency. Furthermore, Theoretical formula describing the frequency change of the quartz crystal microbalance with liquid property is proposed. The predicted results showed distinct coincide with experimental results.

Measurement of Molecular Contamination for Satellites Using a Quartz Crystal Microbalance (QCM)

2004 ◽  
Vol 47 (1) ◽  
pp. 107-110
Author(s):  
Hyokjin Cho ◽  
Guee-Won Moon ◽  
Hee-Jun Seo ◽  
Sang-Hoon Lee ◽  
Seok-Weon Choi
Keyword(s):  
Real Time ◽  
Deposition Rate ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Measurement Data ◽  
Cold Plate ◽  
Gas Chromatograph ◽  
Aerospace Research ◽  
Quartz Crystal Microbalances ◽  
Flight Model

Quartz Crystal Microbalances (QCMs) have been used to measure the molecular contamination for satellites in vacuum bake-out tests at the Korea Aerospace Research Institute (KARI). Through measurement using QCMs, the mass and the mass deposition rate of molecular contamination could be traced in real-time. Vacuum bake-out tests were performed for the satellite KAISTAT-4 Flight Model and its components under various temperature conditions. During these tests, QCM measurement data was obtained and materials from the cold plate were analyzed using a Gas Chromatograph-Mass Spectrometer (GC-MS). The characteristics of the QCM sensor were also observed.

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